Cleaning apparatus for the rolls of paper-making machines



Dec. 6, NORMAN 1,889,838

CLEANING APPARATUS FOR THE ROLLS OF PAPER MAKING MACHINES Filed Aug. 29,1950 2 Sheets-Sheet l Dec. 6, 1932. H. T. NORMAN 1,889,838

CLEANING APPARATUS FOR THE ROLLS OF PAPER MAKING MACHINES File d Aug.29. 1930 2 Sheets-Sheet 2 Invenfiua H-w -w" M Patented Dec. 6, 1932UNITED STATES PATENT Price HARRY T. NORMAN, OF EAST MILLINOCKET, MAINE,ASSIGNOR TO GREAT NORTHERN PAPER COMPANY, OF IVIILLINOCKET, MAINE, ACORPORATION OF MAINE CLEANING .APPAEATUS FOR THE ROLLS F IAPEQt-MAKINGMACHINES .Application filed August 29, 1930. Serial No. 473,652.

This invention relates to paper making and particularly to apparatus forcleanlng the rolls, as the dryingrolls, or cylinders, of apaper makingmachine to remove any particles of pulp andthe like that may be adherentthereto.

With continued use, the sheet supporting surfaces of the drying rolls ofa paper makingmachine accumulate loose pulp fibres and the like from thepaper sheet, the fibres being strongly adherent to the surfaces of therollsand unless they are removed before the accumulation becomes toogreat, they mark or score the surface of the sheet especially where thesheet is wet andtherefore soft and also decrease the drier efficiencyand the heat transfer of the drying rolls covered with the fibres. V

One of the objects of the present lnvention 203 is the provision of anapparatus that can be moved from roll to roll and has a powerdrivencleaning brush that is rotatable in engagement with the surface of theroll for detaching any foreign matter that may adhere 130 the surface,without injuring the surface of the roll.

Another object of the invention is the provision of a cleaning apparatusthat includes a wheeled platform that carries the cleaning device, theplatform having one set of wheels so that the apparatus can bemoved'lengthwise of the machine and having another set of wheels so thatthe apparatus can be moved axially of the rolls so that the cleaningbrush can be moved from one end to the other of the 7 roll in engagementwith the surface thereof. A yet further object of the invention is theprovision of a cleaning apparatus that in cludes a rotary brush at oneend of a shaft that is at least as long as the roll to be cleaned, theshaft being driven by a motor at the end remote from the brush andhaving a supporting device at the brush-end of the shaft that afitisengageable with the drier roll.

Another object of the invention is the provision of cleaning apparatusthat includes a -rotary cleaning brush which is adapted to engagethe-surface of two drier rolls at the same time and means whichis inengagement with the drier rolls for supporting the brush in engagementtherewith.

A further object of the invention is the provision of cleaning apparatushaving a power-driven rotary] cleaning brush and means for directing ablast of air at and ad jacent to the point of the surface of the rollfor removing particles detached by the brush.

A further object is generally to improve the construction and operationof cleaning devices for the rolls of paper making machines.

Fig. 1 is a side elevation of a portion of the drier section of a papermaking machine with the cleaning apparatus of the present inventionassociated therewith.

Fig. 2 is a side elevation of the cleaning apparatus embodying thepresent invention.

Fig. 3 is a. section taken along line 3-3 of Fig. 2.

Fig. 4: is a sectional cleaning brush.

, Fig. 5 is a view similar. to Fig. 3, illusview of the rotary trating amodified form of support for the brush-end of the shaft.

The cleaning apparatus embodying the present invention is especiallyadapted for although not necessarily limited to vthe conoint cleaning ofthe upper and lowerdrying rolls 10 and 12, respectively, of a paperpresent invention includes a truck or carriage 16 which supports thecleaning device. The cleaning device includ-esa rotary brush 18 which iscomposed of a plurality of similar brush sections that are arranged onebe hind the other to provide a cleaning periphery of long axial extent.is composed of a plurality of stiff wires which are laid radially in thebrush so that the free ends of the wires are located at the outerperiphery thereof. The brush sections are carried on the end of a longdriving shaft 20 and are clamped between a collar 22 fixed Each brushsection V to said shaft and a nut 23 which is screwthreaded on the endof said shaft. The shaft is contained within an enclosing and supportingtube 24 and is journalled in suitable bearings 25, one of which isindicated in Fig. 3, located in the ends of the tube. The rear end ofthe tube is. clamped in asupporting bracket 26 which is secured to thetable 28 of the carriage upon a spacing block 30 of suitable height tosupport the brush in operative position with respect to the height ofthe rolls of the particular machine being cleaned. If the rolls ofdifferent paper making machines are of different heights, the block 30can be replaced by other blocks of suitable heights. The rear end of theshaft projects beyond the rear end of the enclosing tube 24 and has alarge gear 32 fixed thereto. Said gear is in mesh with a small or piniongear 34 which is driven by an elec: ric motor 36 that is also carried bythe platform 28 upon blocks 38 similar to the blocks 30. By reason ofthe small and large gears 34 and 32, the speed of the brush is caused tobe less than that of the motor, although the brush speed is adapted tobe reasonably high. A speed of 650 revolutions per minute with a brush8" in diameter gives good results. The shaft and its enclosing tube isadapted to be long enough so that the brush can be moved from one end totheother end of the drying rolls and thus are at least as long as therolls. The carriage 16 is adapted to be moved axially of the dryingrolls so as to move the brush from end to end of the roll. The carriageis thus provided with supporting'wheels 40 which are journalled on axes42 carried by the lower part of the carriage and at right angles to theshaft 20.

Since the shaft 20 is of substantial length, means is provided tosupport the shaft adjacent the brush by the drier rolls. The supportingmeans here shown includes a hub 41 which is fixed upon the outer end ofthe enclosing tube 24 and is secured in place by suitable means as theset-screw 44. The hub is provided at its lower portion with opposit-elyextended arms 46 and 48 which over lie the top of the lower drier rolland in the ends of which arms small wheels 50 are ournalled, said wheelsbeing-adapted to rest upon and be in rolling engagement with the dry ingroll. The hub is also provided with a third arm 52 which exten lsupwardly above the aforesaid arms 46 and 48 and is pivoted tosaid hub bya pivot pin 54. The upper end of said arm rotatably supports wheel orroll 56 which is adapted to be in engagementwith the upper drying roll10. Right and left handed screw-threaded rods 58 and 60 are pivotallyconnected respectively with the arms 52 and 46. Said rods are connectedby a turn buckle 62 which by rotation in one directionor anotherdetermines the spacing between the wheels 50 and 56 and thus closestdistance between said rolls. 7 brush is rotated rapidly and "the drierrolls of the brush with respect to said rolls.

In use the position of the brush is so disposed by a proper adjustmentof the arm 52 that the brush is in engagementwith both the upper and thelower drier rolls lO'and 12, the brush being larger in diameter than theThe are rotated slowly so as to bring all parts of the periphery of therolls in contact with the brush. The 'brush'is moved slowly from one endto the other of the rolls as the cleaning progresses by manually movingthe truck 16 on the wheels 40 so that the entireaxial extent of therolls is subjected tothe cleaning action of the brush. Since thetendency of the brush, due to its rotation and the ro-,

tation of the driers, is to pull the brush into closer engagement withthe driers, one of. the

purposes of the arms 52 and 46 is to prevent this forward movement,thearms being in engagement with both rolls and thereby opposing andpreventing such movement. In some instances it is not necessary to usethe arm- 48 and in F 1g. 5 the hub 42 is lllustrated with the arm 48omitted. The arms 52a and46a of this figure are sufficient to supportthe brush in operatlve position in engagement with both rolls and tohold the brush frombeing pulled into the space between the rolls by therotation of the brush and rolls. The arm 48, however, is desirable whenonly a-single roll is being cleaned as it cooperates with thelarm 46 insupporting the brush upon the r0 After one set of rolls is cleaned, thedevice is adapted to be moved along the drier section to theneXt set of.uncleaned rolls. Tothis end the truck 16. is provided with a second setof supporting wheels 64 which are rotatable at right angles to thewheels 40. Said wheels 64 are journalled in frames 66. which arevertically movable in guideways v68 of the truck 16. under control of aIHELHUZlllY-TO- tatable shaft 70 which is journalled in the frame of thetruck and has eccentrically arranged pins 72 in the ends thereof thatare received in horizontal slots 74 of cross bars site sides of thetruck. By rotating theshaft 70 throughout 180, from the positionillustrated in Fig. 1, the framcs66are caused to be lowered intoengagement with the floor whereby to raise the truckofl' thev wheels 40and thus to permit the truck to be moved lengthwise of the drier. Whenthe truck and the cleaning wheel 18 are located in proper .115 7 6 thatconnect the two frames 66 on oppo-l away from the drying rolls and tomove the cleaning brush lengthwise of the rolls.

Pneumatic means are employed to blow the loosened particles of foreignmaterial away from the vicinity of the brush and the rolls. To this enda pipe 78 is secured by suitable means as the clamps 80 to the tube 24and is extended lengthwise of the tube and is adapted at the motor endto be connected to a flexi ble pipe 82 which communicates with asuitable source of air under an elevated pressure. The brush end of thepipe is provided with opposed branches 84 which terminate in nozzles 86that are inclined to direct blasts of air onto the surfaces of the upperand lower rolls at locations adjacent the region of engagement of thebrush with said rolls so as to sweep away the loosened particles ofmaterial from the vicinity of the brush.

I claim:

1. Cleaning apparatus for the rolls of a paper making machine comprisinga wheeled truck, a driving motor thereon, a. horizontal shaft supportedat one end by the truck and having a driving connection with the motor,said shaft being at least as long as the axial length of the rolls to becleaned, a rotary cleaning brush on the free end of said shaft, andsupporting means for said free end of said shaft located adjacent saidbrush and having supporting elements that bear upon the rolls to becleaned.

2. Cleaning apparatus for the rolls of a paper making machine comprisinga wheeled truck, a driving motor supportedthereon, a horizontal shafthaving a connection with said motor at one end and having a rotarycleaning brush at the other end, said shaft being at least as long asthe axial length of the rolls to be cleaned, a tube which encloses saidshaft and provides a support therefor, said tube having a support onsaid truck at one end and at the other end having means which supportsit upon the rolls to be cleaned.

3. Cleaning apparatus for the rolls of a paper making machine comprisinga truck, a driving motor mounted thereon, a long shaft having a drivingconnection with said motor at one end and having a rotary brush at theother end which is adapted to engage the rolls and supporting means forthe brushend of said shaft, said supporting means having members thatbear on a pair of rolls, whereby to support the brush in engagement withboth rolls.

4. Cleaning apparatus for the rolls of a paper making machine comprisinga truck, a driving motor mounted thereon, a long shaft having a drivingconnection with said motor at one end and having a rotary brush at theother end which is adapted to engage the rolls, and supporting'means forthe brushend of said shaft that bear on a pair of rolls, whereby tosupport the brush in engagement with both rolls, said supporting meansineluding opposed arms having rolLengaging wheels carried thereby. I

5. Cleaning apparatusfor the rolls of a paper making machine'comprisingatruck, a driving motor mounted thereon, a long sh'afthavinga drivingconnection with said motor at one end and having a rotary brush: at theother end which is adapted to engage 6. Cleaning apparatus for theupperand lower rolls of a paper makingmachine ineluding-a rotarybrush-which is adapted to be located'in the space between saidrolls andin engagement with both of them, a powerdriven shaft which carries and.drives'said brush, and supporting means for said shaft comprising amember connected with saidits;

shaft having arms,wheels on said arms which are in rotatable engagementwith said rolls,

and means to move said arms toward and away from each other and to holdthemin any adjusted position.

7 Cleaning apparatus for the upper andlower rolls of a paper makingmachine comprising a rotary brush whichis adapted'to be located in thespace between said rolls and in engagement with both of them, apowerdriven shaft which carries and drives said shaft,and'shaft-supporting' means havin a parts which engage both of saidrolls an which hold said brush in a predetermined location with respectthereto and against the pull of said brush in its rotating engagementwith said rolls. I r a 8. Cleaning apparatus for the rolls of a papermaking'machine comprising a wheeled truck which is movable axially ofsaid rolls, a driving motor supported on said truck, a

shaft having a driving connection with said motor and extended axiallyof said rolls, a

brush carried by said shaft on the end thereof remote from said motor,and shaft-supporting means located on said shaft adjacent said ion n a Irolls, and another arm which has a wheel that can roll upon an adjacentr0ll.. T

10. Cleaning apparatus for the rolls of a paper making machinecomprising a truck a which is movable axially of a roll, a driving motorcarried by said truck, a shaft having a driving connection with saidmotor and extended axiallyof said rolls a rotary brush carried by theend of saidshaft remote from said motor, a tube which encloses saidshaft between. said motor and said brush and which {constitutes asupport for said shaft and which has a support on said truck, andsupporting means for the end of said tube adjacent said brush comprisinga member carried by said tube, said member having outstanding armsprovided with rolls which engage one of the rolls. V

11. Cleaning apparatus for the rolls of a '7 paper making machinecomprising a truck whichis movable axially of a roll, a driving motorcarried by said truck, a shaft having a driving connection with saidmotor and eX- tended axially of said rolls, a rotary brush carried bythe end of said shaft remote from said motor, a tube which encloses saidshaft between said motor and said brush and which constitutes a supportfor said shaft and which has a support on said truck, and supportingmeans for the end of said tube adjacent said brush comprising a membercarried by said tube, said member having outstanding arms provided withrolls which engage one of the rolls, and another arm which has a rollthat engages an adjacent roll.

12. Cleaning apparatus for the rolls of a paper making machinecomprising a truck which is movable axially of a roll, a driving motorcarried by said truck, a shaft having a driving connection with saidmotor and extendedaxially of said rolls, a rotary brush carried by theend of said shaft remote from said motor, a tube which encloses saidshaft between said motor and said brush and which constitutes a supportfor said shaft and which has a support on said truck, and supportingmeans for the end of sald tube ad acent said brush comprising a membercarried by said tube said member having outstanding arms.

provided with wheels which engage one of the rolls and another arm whichhas a wheel that engages an adjacent roll, and means to move certain ofsaid arms toward and away from each other and to hoid them in adjustedposition. I

In testimony whereof, I have signed my name to this specification. I

HARRY T. NORMAN.

